PCV Stalling?
Thread Starter
|
Fleet Mechanic
Joined: Jun 2019
Posts: 1,899
Likes: 236
From: Southern California
PCV Stalling?
I finally got around to adding the PCV valve that the PO forgot. I'm now experiencing hard starting with long cranking. Once started it runs normal. What do I need to change?
Before, it would start with just a key tap, when warm/hot.
Before, it would start with just a key tap, when warm/hot.
Thread Starter
|
Fleet Mechanic
Joined: Jun 2019
Posts: 1,899
Likes: 236
From: Southern California
Not stalling
The truck is a 65 f100 352 4bbl.
FTE Leadership Emeritus
Joined: Jul 2002
Posts: 42,561
Likes: 423
From: Long Island USA
Was the PCV port on the carb plugged before this? The PCV is like a big vacuum leak. You need to retune the carb, especially the idle and choke portion, if the PCV port was plugged.
FTE Leadership Emeritus
Joined: Jul 2002
Posts: 42,561
Likes: 423
From: Long Island USA
Well, start fattening up the idle circuit first. Where did the carb come from? Was it on the engine before the rebuild, after, what?
Trending Topics
Thread Starter
|
Fleet Mechanic
Joined: Jun 2019
Posts: 1,899
Likes: 236
From: Southern California
The carb was new with the rebuild about 10,000 miles ago by the PPO. It's a Holley 4V 650. Been tinkered with... I unhooked the pcv Cause it was the easiest thing to do right then, went to pick up some dinner and in the drive thru the truck started idling bad like it was flooding then it stalled. But before it did the tach cut out a couple times. I went under the hood and wiggled the ignition primary wires a bit, shut the hood and it fired right up. There was no applause from the cars behind me but my girlfriend was awful impressed..
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
Cross-Country
Joined: May 2006
Posts: 75
Likes: 15
The carb was new with the rebuild about 10,000 miles ago by the PPO. It's a Holley 4V 650. Been tinkered with... I unhooked the pcv Cause it was the easiest thing to do right then, went to pick up some dinner and in the drive thru the truck started idling bad like it was flooding then it stalled. But before it did the tach cut out a couple times. I went under the hood and wiggled the ignition primary wires a bit, shut the hood and it fired right up. There was no applause from the cars behind me but my girlfriend was awful impressed..
As mentioned above, the PCV comes with different hole sizes. Is the one you have correct for your engine?
I had the opposite problem when I installed mine. Mine was running to rich so whe the PCV was installed, the idle sped up.
Make sure you did not accidentally disconnect another hose when you installed the valve.
.
Thread Starter
|
Fleet Mechanic
Joined: Jun 2019
Posts: 1,899
Likes: 236
From: Southern California
Ok cool, so I plugged the vacuum port the pcv was before I went to get food and my ignition problem made itself evident. It made it to work in the morning and I fixed the ignition. I removed the ballast resistor and soldered wires together. I ran a new wire to the coil from the starter solenoid so I have full b+ while cranking, Cleaned and tightened all grounds. Truck ran bitchin home last night and all day today, still no pcv. I'm busy tonight.
I'm betting that my pcv issue was mostly an ignition issue.
I'm betting that my pcv issue was mostly an ignition issue.
Thread Starter
|
Fleet Mechanic
Joined: Jun 2019
Posts: 1,899
Likes: 236
From: Southern California
Cont.
Plug the PCV to see if the problem really was caused by the PCV.. If it was caused by it, then proceed to re-tune the carb as recommended above.
As mentioned above, the PCV comes with different hole sizes. Is the one you have correct for your engine?
I had the opposite problem when I installed mine. Mine was running to rich so whe the PCV was installed, the idle sped up.
Make sure you did not accidentally disconnect another hose when you installed the valve.
.
As mentioned above, the PCV comes with different hole sizes. Is the one you have correct for your engine?
I had the opposite problem when I installed mine. Mine was running to rich so whe the PCV was installed, the idle sped up.
Make sure you did not accidentally disconnect another hose when you installed the valve.
.
There is only one other hose and it goes to the dizzy.
Thread Starter
|
Fleet Mechanic
Joined: Jun 2019
Posts: 1,899
Likes: 236
From: Southern California
Me too hiball3985. There was not only the ballast in the ignition circuit, but there was also one on the passenger side fender with cut wires only. But that owner also made his own two-tone paint job with plastidip and hacked up the dash to install a stereo. On the other hand, he had the engine built the way it is and as I learn more about tuning it, It breathes fire!
Logistics Pro
Joined: Mar 2005
Posts: 3,771
Likes: 80
From: tujunga, calif
Just guessing but maybe a coil that requires an external resistor was installed and didn't realize the truck has a resistor wire. Or the resistor wire was replaced with a regular wire so they used the ballast resistor? You may want to check the voltage at the coil after it has run a while.
Thread Starter
|
Fleet Mechanic
Joined: Jun 2019
Posts: 1,899
Likes: 236
From: Southern California
Just guessing but maybe a coil that requires an external resistor was installed and didn't realize the truck has a resistor wire. Or the resistor wire was replaced with a regular wire so they used the ballast resistor? You may want to check the voltage at the coil after it has run a while.
About that PCV though. I definitely want it on there, I'm pushing oil out of the breathers and dirtying my valve covers! Like I mentioned above it has a cam of unknown specs and only pulls about 10" at idle. How would I go about choosing the correct PCV?